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Table 1 Summary characteristics of 97 included systematic reviews

From: Comparison of methodological quality rating of systematic reviews on neuropathic pain using AMSTAR and R-AMSTAR

Characteristic N of SRs
Year
 1995–2000 4
 2001–2005 10
 2005–2010 27
 2011–2015 56
Number of authors
 1 1
 2–5 72
 6–10 23
 > 10 1
Language of the studies included in SRs
 Any language 49
 English 30
 English plus other 18
 Not reported 6
Language of SRs
 English 91
 Chinese 2
 French 1
 German 1
 Spanish 1
 Portuguese and English 1
Number of RCTs included
 0–1 8
 2–10 37
 11–20 30
 21–30 14
 31–40 4
 41–100 3
 > 100 1
Number of databases searched
 1 1
 2–3 27
 4–5 38
 > 6 31
Neuropathic pain type  
 Peripheral 86
 Central 2
 Peripheral and central 9
Total number of patients
 0 7
 1–1000 28
 1001–2000 28
 2001–4000 14
 > 4001 12
 Unclear 8
Meta-analysis
 Yes 65
 No 25
 Not applicable (empty review) 7
Update of previous SR  
 Yes 10
 No 87
Number of updates
 1 7
 2–3 2
 > 4 1
Funding source
 Not reported 35
 No external funding 13
 Government 12
 Foundation 12
 None 11
 Industry 8
 Multiple 6
  1. SR systematic review, RCT randomized controlled trial